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07.05.12

Vratis was awarded by PRACE with a computational grant to study the performance of SpeedIT Multi-GPU and ARAEL on PRACE Research Infrastructure's Tier-0 resources.

   
15.03.12

Vratis portfolio is presented in the Polish Ministry of Economy booth. The presentation is hosted by Wroclaw Technology Park.

   
15.03.12

We are happy to announce a new white paper concerning the Lattice Boltzmann Model.

 

Wall Orientation and Shear Stress in the Lattice Boltzmann Model

 

The abstract:
The wall shear stress is a quantity of profound importance for clinical diagnosis of artery diseases. The lattice Boltzmann is an easily parallelizable numerical method of solving the flow problems, but it suffers from errors of the velocity field near the boundari

   
15.03.12

We are happy to announce a new white paper that describes CMRS format.

 

Compressed Multiple-Row Storage Format

 

The abstract:
A new format for storing sparse matrices is proposed for efficient sparse matrix-vector (SpMV) product calculation on modern throughput-oriented computer architectures. This format extends the standard compressed row storage (CRS) format and is easily convertible to and from it without any memory overhead. Computational performance of an SpMV kernel for the new format is determined for over 140 sparse matrices on two Fermi-class graphics processing units (GPUs) and the efficiency of the kernel, which peaks at 36 and 25 GFLOPS at single and double precision, respectively, is compared with that of five existing generic algorithms and industrial implementations. The efficiency of the new format is also measured as a function of the mean (\mu) and of the standard deviation (\sigma) of the number of matrix nonzero elements per row. The largest speedup is found for matrices with \mu > 20 and \mu > \sigma > 1.5 and can be as high as 43%.

 

The publication can be downloaded at http://arxiv.org/abs/1203.2946